I2c Analog Multiplexer. You need one if you do not have a spare gpio pin to control it. I2c bus switches multiplexer vs analog switch multiplexer.
The multiplexer itself is on i2c address 0x70 but can be adjusted from 0x70 to 0x77 and you simply write a single byte with the desired multiplexed output number to that port and bam any future i2c packets will get sent to that port. That would avoid me connecting every mux to it s own arduino. All i o pins of tca9548a are 5 volt tolerant and can also be used to translate from high to low or low to high voltages.
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Multiplexers muxes and switches fan the input i 2 c smbus signals to two four or eight downstream channels of scx sdx pairs. 4 2 out of 5 stars 31. Analog multiplexers work just fine for i c signals if you keep the impedance and parasitic cpacitance small enough which is usually not a problem. Multiplexers muxes and switches fan the input i 2 c smbus signals to two four or eight downstream channels of scx sdx pairs.
